The department of Electronics and Communication Engineering, School of Engineering , Amrita Vishwa Vidyapeetham, Coimbatore campus, organized a national workshop on Software Defined Radio and its Strategic Applications from January 21-22, 2016.

About the Workshop

The main highlight of the workshop was to emphasize design of digital radio on reprogrammable, reconfigurable hardware platform. The various hardware that support this are Universal Software Radio Peripheral (USRP), RTL-SDR, Hack RF, Blade RF. These boards differ in cost, architecture, frequency range. Workshop focused on the modular architecture of USRP and its related open source software development tool GNU Radio. USRP developed by Ettus research supports frequency range from DC to 6 GHz. This hardware is interfaced with PC though Ethernet port, the RF signal can be sourced in/ sinked out using GNU radio, an open source software development toolkit for digital radio. With the setup of USRP and GNU Radio, hands-on-training on various communication techniques like modulation, filter design, spectrum analysis and demonstration of real-time applications such as  FM Receiver, Dial tone transmission and reception, Mode-S transponder, Open BTS were emphasized. A setup to show data transmission and reception using Raspberry Pi and RTL-SDR was also demonstrated.  This highlighted the impact of free space channel impairments on the data transmission and means of restoring the signal strength using RTL-SDR. Thus the workshop focused on exposure to open source software tool and modular reprogrammable hardware (USRP) that supports a wide frequency range for design of digital radio systems


We had mixed group of participants from Industry and Academia. To list a few, we had Scientist from Indira Gandhi Centre for Atomic Research (IGCAR) - Kalpakkam, Faculty and students from SASTRA University, PSG Tech, Govt. Engg College-Kerala, NSS College of Engg, Bannari Amman Institute of Technology and Amrita School of Engineering.


  • As the workshop was attended by Scientist from IGCAR, Faculty and students from SASTRA University, PSG Tech and other reputed institutions created an impact for Amrita focusing on advanced area of research and development.
  • USRP based training, workshops and teaching is one of the state-of-the-art technological facility globally accepted for simulation and design of wireless communication systems.
  • The students who attended this workshop were given hands-on-training with basic analytical explanations making themselves competent for placement in core industries
  • This workshop gave research openings and opportunities in this area utilizing the existing facility for more quality publications and project work.

Technical Sessions

Dr. K.P.Soman

Professor and Head of Department, 
Computational Engineering and Networking, 
Amrita School of Engineering, Coimbatore

Topic : Software Defined Radio’s The Next Wave: Fully Digital Radios

To his credit, he has authored several books, to list a few; Data Mining: Theory and Practice, Insight into wavelets: From theory to practice, Sparse Signal and Image Processing.  In addition to this, he has several Journal and Conference publications.  Has been the Principal Investigator in the following funded projects Software Radio applications in implementing Virtual labs for MHRD, New Delhi, India. Particle Image Velocimetry and Planar Laser Induced Fluorescence studies for flow visualization and characterization (funded by ISRO). Massively Parallel Support Vector Machines for target identification (funded by DRDO). Implementation of Image Fusion Algorithms for ADE, Bangalore. His research interests include Software Defined Radio,  Statistical Digital Signal Processing (DSP) on Field Programmable Gate Array (FPGA), Wireless Sensor Networks (WSN), High Performance Computing, Machine learning using Support Vector Machines, Signal Processing, Wavelets & Fractals.

Topics Covered in the Session

  • Book on RTL-SDR   interfacing with Matlab and Simulink
  • Signal/image processing = Linear Algebra + Optimization 
  • Fully Digital Radio- Pizzicato
  • High data-rate wireless Communication = High Speed Computing
  • Zed Board, Jetson Tx1

Mr. Ajith Peter

Topic : From Spark Gaps to Cognition

He received his master’s degree in Computational Engineering from the Centre for Excellence in Computational Engineering and Networking (CEN), Amrita Vishwa Vidyapeetham, Coimbatore Campus in 2005. He has an experience in the RF, Embedded Systems and Communications industry for the past 11 years.

Research  Interest: Computational Engineering, Signal Processing, Software  Defined Radios and Global Navigation Satellite Systems (GNSS)

Topics Covered in the Session

  • The architecture of Classical vs Software Defined Radio Systems
  • Evolution of Software Defined Radio Architectures
  • Various Hardware platforms for Software Defined Radio
  • Various Software Platforms for Software Defined Radios
  • The architecture of RTL SDR SDR Platform.
  • An Introduction to Inphase and Quadrature Signal Representation
  • Applications of Software Defined Radios
  • Demonstration of various SDR applications - Wideband FM Reception, Narrow Band FM Reception, Digital Communications with AX.25 Amateur Packet Radio, Some weather satellite maps captured with RTL-SDR from NOAA-19 and METEO Satellites.


Mr. R. Gandhiraj

Assistant Professor
Department of Electronics and Communication Engineering
Amrita School of Engineering, Coimbatore

Topic : Multirate Signal Processing in Software Defined Radio

Topics Covered in the Session

  • Analog & Digital Comm. System
  • Role of SDR in developing Communication System
  • Architecture of USRP
  • Signal Processing Foundations
  • Multirate Signal Processing
  • Multirate Signal Processing applications.

Mr. Umashankar Shetty

Design Engineer & Workshop Manager,
Tenet Technetronics.

Mr. Pandidurai

Design Engineer, Tenet Technetronics.

Topic : Software Defined Radio, GNU Radio,USRP Applications

Session Overview

The session detailed about the GNU Radio tool, blocksets and flowgraph construction. Various signal processing operations, filter design, multirate signal processing were emphasized during hands-on practice session. Also demonstration of real-time applications like FM receiver, OpenBTS using USRP formed part of the discussion


Event Details
2016-01-21 09:30 to 2016-01-22 17:30
School of Engineering